When we exercise hard, we burn fat. But have ...

When we exercise hard, we burn fat. But have you ever wondered where exactly the fat goes?

Some doctors think that fat is changed into heat and released in the air. Others think the body burns it. Some even joke that the fat fairy comes and takes it. That is why you always weigh less in the morning.

Now a new study from the University of New South Wales in Australia reveals the mystery. “the correct answer is that most of the mass is breathed out as carbon dioxide(二氧化碳). It goes into thin air,” says the study’s lead author, Ruben Meerman, to Science Daily. Scientists followed the atoms(原子) in 10 kilograms of fat as they are lost. They found that 8.4 of those kilograms are breathed out as carbon dioxide through the lungs. The rest of the weight —1.6 kilograms— becomes water that leaves the body in the form of fluids(液体) such as urine(尿), sweat, breath and tears. “None of this is obvious to people because we can’t see the carbon dioxide gas we breathe out,” said Meerman.

Does that mean you can lose more weight by breathing more? It is not as easy as you think. Breathing more than the body’s metabolic rate(新陈代谢) can make you uncomfortable. You may feel dizzy and become unconscious(无意识的), according the study. So how to lose weight healthily? The key is to eat less and move more. You many have heard this many times.

During a day, a 70kg person breathes out about 200g of carbon dioxide. So if the same person wants to lose weight, he or she can do some light exercise, for example, jogging. This can help lose 240g of carbon dioxide.

1.According to the new study, where does our fat go when we exercise a lot?

A.It is changed into heat and given off in the air. B.The body burns it.

C.The fat fairy comes and takes it. D.Most of it is breathed out as carbon dioxide.

2.What will happen to people if they breathe more than the body’s metabolic rate?

A.They will put on more weight. B.They will feel comfortable.

C.They may become unconscious. D.They may not lose weight at all.

3.Which of the following is a better way to lose weight?

A.Sitting still and breathing more. B.Sleeping a lot and breathing a lot.

C.Eating less and exercising more. D.Eating more and doing some light exercise.

4.Which is true according to the study from University of New South Wales?

A.The fat is changed into heat and released in the air.

B.Most of the kilograms of fat as they are lost are breathed out as carbon dioxide.

C.People can see the carbon dioxide gas we breathe out.

D.If we breathe more than the body’s metabolic rate, we will feel good.

5.During a week , how much carbon dioxide does a 70kg person breathes out?

A.240g B.200g C.1400g D.1680g

九年级英语阅读单选困难题查看答案及解析

It may not be hard to name the most popular girl or boy at school. But have you ever wondered what m1.them popular? Is it about wearing the latest fashion or being in the basketball t2.?

The secret to being p3.at school, according to an Australian study published in the Journal Child Development this month, is neither of those things. I4., it is empathy(感同身受), or understanding and s5. others’ feelings, reported Science Daily.

Popular children are “b6. at knowing what others want, think and f7.”, according to the study.

The study included 2,096 children f8. 2 to 10 years old from Asia, Australia, Europe, and North America.

“Our study suggests that understanding o9. feelings can help children become or remain popular”, wrote Virginia Slaughter, professor(教授) of psychology at the University of Queensland, who led the study.

“It means empathy is important both for making friends in the early school years a10.for keeping friendships as children grow older”, added the Daily Mail.

九年级英语单词填空困难题查看答案及解析

Taking some exercise every day will 　　　　 fat and make you fit.

A. turn to　　　 B. sell out　　 C. burn off　　 D. put on

九年级英语单项填空中等难度题查看答案及解析

When you sit down with your family to eat a meal, have you ever wondered when and where people used chopsticks for the first time?

It's said that the first chopsticks were used in China 5, 000 years ago. Since then, chopsticks have even widely used in many countries in Asia, such as China, Japan and Korea. Chopsticks are made of different kinds of materials.　 The materials like bamboo and wood are common because they are easy to get. People also use bones for chopsticks.　 Even many valuable materials like silver can be used to make chopsticks. There are also many table manners connected with chopsticks. For instance, never stick your chopsticks straight in your rice bowl. People believe this is　　 A　　 to the host.

根据短文内容完成表格，每空一词。

1.____________

2.____________

3.____________

4.____________

5.____________

6.从文中找出与 “Many kinds of materials are used to make chopsticks. ”意思相同或相近的句子。_______________________________________________________________________________________

7.将画线短语 table manners connected with chopsticks译成汉语。_______________________________________________________________________________________

8.选出适合填在A处的单词，将字母代号填写在答题卡上。_____________

A.friendly B.impolite C.polite D.necessary

九年级英语多任务混合问题中等难度题查看答案及解析

We all enjoy the beautiful show of colours as leaves change each autumn. But did you ever wonder how and why this happens?

Leaves are nature’s food factories. Plants take water from the ground through their roots and take carbon dioxide (二氧化碳) from the air. Plants use sunlight to turn water and carbon dioxide into glucose (葡萄糖). Glucose is a kind of sugar, which plants use as food for energy and growing.

The way plants turn water and carbon dioxide into sugar is called photosynthesis that means “ putting together with light”. A chemical called chlorophyll helps photosynthesis. It gives plants their green colour. As summer ends and autumn comes, the days get shorter and shorter, and trees “know” to begin getting ready for winter.

During winter, there is not enough light or water for photosynthesis. Trees rest during this time and live on the food they store during the summer. They begin to shut down their food-making factories.

As the green chlorophyll disappears from the leaves, we begin to see yellow and orange leaves. Small amounts of these colours have been in the leaves all along. We just can’t see them in the summer, because they are covered up by the green chlorophyll.

The bright reds and purples we see in leaves are made mostly in autumn. In some trees, like maples (枫树), glucose is caught in the leaves after photosynthesis stops. Sunlight and the cool nights of autumn turn this glucose into a red colour. The brown colour of trees like oaks (橡树) is made from waste left in the leaves.

It is the mixture of all these things that makes the beautiful colours we enjoy during autumn.

1.The word “chlorophyll” in the third paragraph means _______ in Chinese.

A．叶绿素           B．氧气             C．胡萝卜素         D．蛋白质

2.The leaves of the trees in autumn turn yellow because of the short of _____.

A．water and carbon dioxide

B．glucose and energy

C．sunlight and water

D．sunlight and carbon dioxide

3.The way that _______________________ is called Photosynthesis .

A．plants change water and carbon dioxide into sugar

B．plants turn water and carbon dioxide into sugar with the help of sunlight

C．plants use glucose as food for energy and growing

D．chlorophyll is a great help

4.Which of the following is NOT true?

A．When autumn and winter come, the days get shorter and shorter.

B．During winter trees rest and live on the food they store during the summer.

C．During winter small amounts of yellow and orange colours are kept in the leaves all the time.

D．Trees begin to stop making food in summer.

5.This passage tells us __________________.

A．all the plants can grow well with the strong sunlight

B．there are all kinds of plants on the earth

C．all the colours of the leaves aren’t made from chlorophyll

D．maples and oaks have the same reason as other trees for the change of colours

九年级英语阅读理解中等难度题查看答案及解析

Have you ever wondered what goes through your mind when you choose where to sit in a new classroom? Or in a waiting room full of strangers? Or on a bus? Researchers have found out some interesting facts.

Perhaps unsurprisingly, we prefer to sit closer to people like ourselves. Girls sit by girls and boys sit by boys. Adults sit together and young people choose another young person to sit near. But it goes further than this. We even choose to sit near someone who looks like us. People with glasses are more likely to sit near other people with glasses. People with long hair sit closer to other people with long hair.

We seem to believe that people with similar habits or hobbies will share similar attitude and we are more likely to be accepted by people like ourselves or even, we think we may be safer with people who look like us. Sometimes that’s true but it's a pity if we always stick to the same people, the same group. The danger in always staying in our comfort zone (舒适区)is that we just recycle the same opinions, the same tastes and the same ideas. We lose the chance to learn something new, find out about interesting things, hear funny stories and discover difference.


When we always stick to the same people, how can we ever break down the barriers which prevent us from getting to know people with different ideas? And how can we avoid the ignorance (无知),which too often leads to prejudice (偏见) and even fear? If instead you want to live in a society that opens to changes and new things and different opinions, be the cat among the pigeons.

Move out of your comfort zone. Go and sit next to someone different. And don't just sit there in silence. Say hello. Ask a question. Start a conversation. That’s how we make friends. That’s how we learn about people. That’s how we open our minds to new ideas. That's how we live an exciting life.

1.From the passage, we know that people prefer sitting by someone who

A. is like themselves

B. has a sense of humor


C. is open-minded

D. lives an exciting life

2.People like staying in their comfort zone because they may

A.    remain comfortable and special

B.    be accepted easily and feel safe

C.    find out more interesting things

D. discover differences among themselves

3.What is the purpose of the passage?

A. To tell us just to be ourselves in social life.

B. To introduce ways to learn about the world.

C. To explain how people communicate with others.

D. To encourage us to meet people of different kinds.

九年级英语阅读理解极难题查看答案及解析

Have you ever wondered what goes through your mind when you choose where to sit in a new classroom? Or in a waiting room full of strangers? Or on a bus? Researchers have __________ some interesting facts.

Perhaps, we prefer to sit __________ to people like ourselves. Girls sit by girls and boys sit by boys. Adults sit together and young people choose another young person to sit near. We even choose to sit near someone ______looks like us. People with glasses sit near __________ people with glasses. People with long hair sit closer to other people with long hair.

We seem to believe __________ people with similar habits or hobbies will share similar attitude, or even we think we may be safer with people who look like us. Sometimes that’s true __________ it's a pity if we always stick to the same people, the same group. The __________ in always staying in our comfort zone (舒适区)is that we just recycle the same opinions, the same tastes and the same ideas. We lose the chance to learn __________, find out about interesting things, hear funny stories and discover differences.

Move __________ your comfort zone. Go and sit next to someone ___________. And don't just sit there in silence. Say hello. Ask a question. Start a conversation. That’s we make friends. That’s how we learn about people. That’s how we open our minds to new ideas.

1.A. looked for　　 B. found out　　 C. looked over　　 D. made out

2.A. farther　　 B. nearer　　 C. closer　　 D. smaller

3.A. what　　 B. which　　 C. whom　　 D. who

4.A. other　　 B. others　　 C. the other　　 D. another

5.A. that　　 B. what　　 C. if　　 D. when

6.A. /　　 B. and　　 C. so　　 D. but

7.A. advantage　　 B. danger　　 C. importance　　 D. advice

8.A. everything new　　 B. anything new　　 C. nothing new　　 D. something new

9.A. out of　　 B. from　　 C. into　　 D. to

10.A. similar　　 B. important　　 C. different　　 D. outgoing

九年级英语完型填空困难题查看答案及解析

Have you ever wondered what goes through your mind when you choose where to sit in a new classroom? Or in a waiting room full of strangers? Or on a bus? Researchers have found out some interesting facts.

Perhaps unsurprisingly, we prefer to sit closer to people like ourselves. Girls sit by girls and boys sit by boys. Adults sit together and young people choose another young person to sit near. But it goes further than this. We even choose to sit near someone who looks like us. People with glasses are more likely to sit near other people with glasses. People with long hair sit closer to other people with long hair.

We seem to believe that people with similar habits or hobbies will share similar attitude and we are more likely to be accepted by people like ourselves or even, we think we may be safer with people who look like us. Sometimes that’s true but it's a pity if we always stick to the same people, the same group. The danger in always staying in our comfort zone (舒适区)is that we just recycle the same opinions, the same tastes and the same ideas. We lose the chance to learn something new, find out about interesting things, hear funny stories and discover difference.


When we always stick to the same people, how can we ever break down the barriers which prevent us from getting to know people with different ideas? And how can we avoid the ignorance (无知),which too often leads to prejudice (偏见) and even fear? If instead you want to live in a society that opens to changes and new things and different opinions, be the cat among the pigeons.

Move out of your comfort zone. Go and sit next to someone different. And don't just sit there in silence. Say hello. Ask a question. Start a conversation. That’s how we make friends. That’s how we learn about people. That’s how we open our minds to new ideas. That's how we live an exciting life.

1.From the passage, we know that people prefer sitting by someone who

A. is like themselves　　 B. has a sense of humor

C. is open-minded　　 D. lives an exciting life

2.People like staying in their comfort zone because they may

A. remain comfortable and special　　 B. be accepted easily and feel safe

C. find out more interesting things　　 D. discover differences among themselves

3.The underlined word “barriers” in Paragraph 4 means 　　　　　 .

A. doors　　 B. difficulties　　 C. ideas　　 D. rules

4.Why does the writer ask us to meet people of different kinds?

A. Because we feel safer and share similar tastes and ideas.

B. Because we can enjoy an interesting and different ideas.

C. Because we can say hello and ask them questions.

D. Because we want to live in a society full of humour.

5.What is the title of this passage?

A. Just to be ourselves　　 B. Learn more about the foreign countries

C. Live an exciting life　　 D. Jump out of the comfort zone

九年级英语阅读单选中等难度题查看答案及解析

①Have you ever wondered what goes through your mind when you choose where to sit in a new classroom? Or in a waiting room full of strangers? Or on a bus? Researchers have found out some interesting facts.

②Girls sit by girls and boys sit by boys. Adults sit together and young people choose another young person to sit near. But it goes further than this. We even choose to sit near someone who looks like us. People with glasses are more likely to sit near other people with glasses. People with long hair sit closer to other people with long hair.

③We seem to believe that people with similar habits or hobbies will share similar experiences and we are more likely to be accepted by people like ourselves， or even， we think we may be safer with people who look like us. Sometimes that’s true but it’s a pity if we always stay with the same people， the same group. The danger in always staying in our comfort zone (舒适区)is that we just recycle the same opinions， the same tastes and the same ideas. We lose the chance to learn something new， find out interesting things， hear funny stories and discover differences.

④When we always stay with the same people， how can we break down the barriers which prevent us from getting to know people with different ideas? And how can we avoid the ignorance(无知)? If you want to live in a society that opens to changes， new things and different opinions， be the cat among the pigeons(鸽子).

⑤Move out of your comfort zone. Go and sit next to someone different. And don’t just sit there in silence. Say hello. Ask a question. Start a conversation. That’s how we make friends. That’s how we learn about people. That’s how we open our minds to new ideas. That’s how we live an exciting life.

1. From the passage， we know that people prefer sitting by someone who 　　　　 .

A. is like themselves　　　　　 B. has a sense of humor

C. is open-minded　　　　　　　　 D. lives an exciting life

2. People like staying in their comfort zone because they may 　　　　　 .

A. remain comfortable and special

B. find out more interesting things

C. be accepted easily and feel safe

D. discover differences among themselves

3.The sentence “Unsurprisingly， we prefer to sit closer to people like ourselves.” should be put at the beginning of __________.

A. Paragraph 1　　　　 B. Paragraph 2

C. Paragraph 3　　　 D. Paragraph 4

4.What does the underlined word“barriers” mean in Paragraph 4?

A. 联系　　　　　 B. 隔阂　　 C. 纽带　　　　　 D. 熟悉

5.What is the purpose of the passage?

A. To tell us not to talk with strangers.

B. To introduce ways to learn about the world.

C. To explain how people communicate with foreigners.

D. To encourage us to get along with different people.

九年级英语阅读理解中等难度题查看答案及解析

①Have you ever wondered what goes through your mind when you choose where to sit in a new classroom? Or in a waiting room full of strangers? Or on a bus? Researchers have found out some interesting facts.

②Girls sit by girls and boys sit by boys. Adults sit together and young people choose another young person to sit near. But it goes further than this. We even choose to sit near someone who looks like us. People with glasses are more likely to sit near other people with glasses. People with long hair sit closer to other people with long hair.

③We seem to believe that people with similar habits or hobbies will share similar experiences and we are more likely to be accepted by people like ourselves or even, we think we may be safer with people who look like us. Sometimes that’s true but it’s a pity if we always stay with the same people, the same group. The danger in always staying in our comfort zone (舒适区)is that we just recycle the same opinions, the same tastes and the same ideas. We lose the chance to learn something new, find out about interesting things, hear funny stories and discover difference.

④When we always stay with the same people, how can we break down the barriers which prevent us from getting to know people with different ideas? And how can we avoid the ignorance (无知)? If you want to live in a society that opens to changes, new things and different opinions, be the cat among the pigeons（鸽子）.

⑤Move out of your comfort zone. Go and sit next to someone different. And don’t just sit there in silence. Say hello. Ask a question. Start a conversation. That’s how we make friends. That’s how we learn about people. That’s how we open our minds to new ideas. That’s how we live an exciting life.

1.From the passage, we know that people prefer sitting by someone who 　　　　 .

A. is like themselves　　　　　　 B. has a sense of humor

C. is open-minded　　　　　　　　 D. lives an exciting life

2.People like staying in their comfort zone because they may 　　　　　 .

A. remain comfortable and special

B. find out more interesting things

C. be accepted easily and feel safe

D. discover differences among themselves

3.The sentence “Unsurprisingly, we prefer to sit closer to people like ourselves.” should be placed at the beginning of __________.

A. Paragraph 1　　　　 B. Paragraph 2

C. Paragraph 3　　　　 D.Paragraph 4

4.What does the underlined word “barriers” mean in Paragraph 4?

A. 联系　　　　　　　　 B. 纽带

C. 隔阂　　　　　　　　 D. 熟悉

5.What is the purpose of the passage?

A. To tell us just to be ourselves in social life.

B. To introduce ways to learn about the world.

C. To explain how people communicate with others.

D. To encourage us to meet people of different kinds.

九年级英语阅读理解中等难度题查看答案及解析